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22 Cards in this Set
- Front
- Back
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What does actaldehyde taste like?
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green apples
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What are the two causes of actaldehyde in beer?
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contamination and immature beer
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What does astringency taste like?
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black tea
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What are two causes of astringency in beer?
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steeping grains at too high a temperature or overcrushing grain
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What does diacetyl taste like?
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butter or butterscotch
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What are two causes of overly-high levels of diacetyl?
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infection or removing beer before fermentation is complete
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What does dimethyl sulfide taste like?
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cabbage or seafood
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What are two causes of dimethyl sulfide in beer?
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infection or covering the brew kettle during the boil
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What is another term for dimethyl sulfide?
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DMS
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What do esters taste like in beer?
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fruit, such as banana or cherry
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What causes fruity esters in beer?
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fermenting at high temperature; some yeast strains produce more esters than others
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What do phenols taste like?
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band-aids
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What are two causes of phenols in beer?
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Unrinsed bleach and overcrushed grains
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What causes skunking?
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Light or oxidation
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What causes overly-sour beer?
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infection
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What are two causes of sulfur in beer?
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Yeast cannibalism (sitting on yeast cake too long) or infection
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What causes a taste or smell of rotten eggs?
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Sulfur
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What chemical causes a band-aid-like taste?
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Phenols
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What chemicals cause fruity flavors such as banana or cherry?
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Esters
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What chemical causes a cabbage-like or seafood-like taste?
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Dimethyl sulfide (DMS)
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What chemical causes a buttery or butterscotch flavor?
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diacetyl
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What chemical causes a green apple-like flavor in beer?
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actaldehyde
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